Cushion-spring.



e. 0. BRANDT & T. MAHONEY.

CUSHION SPRING.

APPLlCATlON FILED MAR. 25, 19!].

1,257,310. Patented Feb. 26, 1918.

IN VE IV TOR Gusmv QBRAND THOMAS MAHoA/EY.

UNITED STATES PATENT ormca.

GUSTAV O. BBANDTAND THOMAS MAHONEY, OF DETROIT, MICHIGAN, ASSIGNORS T0 LEONARD A. YOUNG, OF HIGHLAND PARK, MICHIGAN.

cusmon-srnms.

To all whom it may concern:

Be it known that We, GUSTAV O. BRANDT and THOMAS MAHONEY, citizens of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in Cushion-Springs, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of: this specification.

This invention relates to cushion springs in which the supporting springs are tied together by what is believed to be a new and useful connecting element. This con necting element is characterized by holding the springs in erect uniformly spaced positions but capable of allowing them to approach or draw away from one another when subjected to stresses.

In the drawings,-

Figure 1 is a plan view.

Fig. 2 is a section on the line AA of Fig. 1.

Fig. 3 is an enlarged section detailing the tying members.

Fig. 4 is an enlarged detail showmg the looking at the intersecting of two ties.

The usual hour-glass springs are designated a the border wire 6. Along the front edge of the border wire is a reinforcing bar 0 clipped to the border wire by turned-over ends (1 and the bands 6 which pass through slots 7 in the strip 0. The purpose of this strip is to give additional strength to the border wire and to give a broad supporting surface at that point of the spring where ones legs hang over.

The ties are diagonally arranged coil springs which are not broadly new for this purpose, but it is thought that the combination of these coil springs and the floating guide rod which passes through them and serves to automatically lock the tying springs to the supporting springs, is new. The coil springs are designated 9; the guide rods h. Referring to Fig. 3,'it will be apparent how very easily and nicely the ties are connected with the to coils of the supportin springs. The coi ed tie g is slipped over t e top part of the spring, slightly spreading two of the coils of the tie. Where Specification of Letters Patent.

Application filed March 26, 1917. Serial No. 157,354..

two of the coiled ties intersect, they are slipped down over each other by spreading the coils. The guide wire or rod h. is then inserted, the result being that this in connection with the coils, as for instance, at i (Fig. 3) locks the top coil of the hour-glass spring and the tie together, but at the same time allows the top coil of the hour-glass sprlng to move in a substantially horizontal plane along the guide rod k. A similar joint between intersecting coils or ties is detailed in Fig. 4.

If a load is received at the middle of the cushion spring, the hour-glass springs, of

course, tend to collapse, but the downward I secting ties. At the ends of the rods they are preferably hooked over as at and where two books come together as at they are clipped together. The ends of the coil springs abut against these hooks, and consequently when theguide rod is flexed under a load or one of the hour-glass springs through which it passes, the flexure pulls the rod and this pull of the rod is resisted at the ends by the entire length of the coil springs. The consequence of this constructlon is that the load is distributed over the entire upper surface ofthe cushion, yet the top coils of the hour-glass springs are not unnecessarily tipped over to tend to keep their erect posltion by reason of being hel up by the guide rods. It is also to be noted that the guide rods in connection with the coil springs through which they pass, lock the ties to the hour-glass springs and the intersecting ties Without any further fastening; yet the lock is of such character that one may move with respect to the othera very desirable feature in connection with the distribution of strains over the entire spring. This form of a tie also forms a strong support for the upholstering cover both 1n spaces intervening between the springs and also in the spaces described by the top coils of the supporting springs.

It is not absolutely necessary that the ends of the ties be hooked and free, they might be attached in arious Ways to a rim member or other device. This is indicated in the lower part of Fig. 1.

What We claim is:

1. In a cushion spring, the combination of a plurality of supporting springs, a tie therefor, comprising a coil spring fitting over the top coils of the supportingsprings, and a rod passing through the 0011s of the coil springs and serving in connection with the same to lock the tie to the top coils of the supporting springs and having one or more of its ends arranged to abut against the end or ends of the coil springs.

2. In a cushion spring, the combination of a plurality of supporting springs, a plurality of intersecting ties, each tie including an extensible and contractible member provided with means for transmitting stresses to the ends of the tie Where they are resisted by yielding resistance to the longitudinal contraction of the tie.

3. In a cushion sprin the combination of a plurality of coil sprlngs, a border Wire, and a flat strip secured to the border Wire along the front edge of the cushion spring and supported on top of the supporting springs, for the purpose specified.

In testimony whereof We sign this specifica-tion.

GUSTAV O. BRANDT. THOMAS MAHONEY. 

